What did the Romans build as a step toward environmental
management?

Aqueducts

Explanation:

The aqueducts where gigantic and long constructions that carries fresh water from the surroundings to the cities, and they also carried out of the cities the waste that the human activities generated, this was one of the  greatest inventions and contributions to human kind, they were replicated all over the world because of its great use and commodity.

1. a host loses nutrients to a parasite

2. a parasite only benefits when the host is alive (cause if the host dies the parasite dies with it )

3. producers to consumers

4. the tapeworm is a parasite

5. they convert energy from the sun (photosynthesis)

6. sunflower-robin (i think im 80% sure)

7. producer

8. consumer

9. prey

10. fresh water snails ( cause the green algea is the producer and the snails are the primary consumers and the small fish consumer so is the big fish)